Method of and means for protecting inscriptions



March 21, 1933. E. J. SCHWANTES METHOD OF Filed Jan. 18, 1952 ZZWENTMZ 55% mm .2? s

Patented Mar. 21, 1933 UNITED STATES EVERETT J". SCHWANTEfiOF CH ICAGO, ILLINOIS METHOD OF AND MEANS FOR'IRQTEGTING INSGRIPTIONS Application filed January 18, 1932. Serial N... 587,390.

The invention relates to a method of and means for protecting numbers, legends, or the like against effacing.

More particularly, the invention is concerned with the protection of serial numbers of motors against eifacing or alterations, and disclosing any surreptitious attempts so made.

It is an object of the invention to provide a novel method of and means for protecting in scriptions against eifacing and to render such attempts visible.

It is a further object of the invention to provide a casing of a motor with a raised plate, and to provide the surface of such plate with uneven portions, and subsequently to stamp on such plate the required number so that the bottom of each of the grooves of the numerals is at a comparatively considerable distance from the outermost points of the raised portions on the plate.

A further object of the invention is to provide a method of this kind which consists generally in providing a surface having the vdesired inscription characters thereon with faces spaced to one side of the plane of said surface and then forming other characters in said surface by means of V shaped grooves that cut through portions of the faces of said inscription characters and into said surface, whereby attempts made to change said other characters are readily apparent and visible.

It is a further object of the invention to provide certain features of construction and design tending to enhance the reliability and effectiveness of the invention.

These and other equally important objects in View will become apparent from a perusal of the invention which comprises the means described in the following specification, particularly pointed out in the claims forming a part thereof, and illustrated in the accompanying drawing. in which:

Fig. 1 is a fragmentary elevational view of a combustion motor to which the invention has been applied.

Fig. 2 is an enlarged fragmentary perspective view of a motor casing equipped with a numbering plate constructed in accordance with my invention; and

Fig. 3 is a detailed section on'the line 33 of F' ignates a motorwhose' casing 10 is equipped with a raised plate 11 which is of oblong form and may be cast integral with the casing wall. Also cast integral with the plate 11', and standing'out from the surface thereof is a plurality of raised inscription characters which may be in theform of numerals or letv ters 12 arbitrarily distributed over thesui face and having faces spaced from the plane ofsaid surface. These characters, however, are sufliciently close together so as tobe.

crossed by the numbers subsequently applied. Other characters which may be numbers 13 are formed in said surface and as is ;obvi-. ous from Fig. 2 such other characters are superposed on the raised portions or letters 12.

As appears from Fig. 3 the characters13 order to efi'ace or alterthe numbers or other characters 13 damage must bedone to the in scription characters as provided by the raised portions or letters 12, destroying thereby the neat appearance and the general'impressifon of the inscription characters and this, of

course, will make such alterations readily Visible. I p

By this means a superficial glance of the plate will at once establish the fact that the number plate has been tampered with and thus renders visible any surreptitious attempt, to change the numbers of themotor.

Whilethe drawing discloses a preferred embodiment of the invention, the same is merely illustrated by way of explanation and i not by way of limitation. a

Innumerable changes, alterations, and revisions may be made within the purview of the invention.

I, therefore, do not wish to limit myself Referring to the drawing M generally des-;

to the details of construction or arrangement of parts, as shown, but claim my invention as broadly as the state of the art permits.

I claim: 1. The method of protecting inscriptions against effacing, which consists in providing a surface with inscription characters thereon having faces spaced to one side of the plane of said surface and then forming other char- 10 acters in said surface by means of grooves which cut into said surface and through the faces of said inscription characters.

2. The method of protecting inscriptions against effacing, which consists in providing a surface with raised inscription characters thereon having faces arranged in a plane spaced outwardly from saidsurface and then forming other characters in said surface by T means of grooves which cut through said raised inscription characters and extend into a plane below said surface.

3. The method of protecting inscriptions against efi'acing, which consists in providing a surface with inscription characters thereon having faces spaced to one side of the plane of said surface and then stamping other characters in said surface and which other characters are defined by V shaped grooves that cut'through said surface and through portions of the faces of said inscription characters.

4. The method of'protecting inscriptions against efi'acing, which consists in providing a surface with raised inscription characters thereon having faces arranged in a plane spaced outwardly from said surface and then stamping other characters in said surface and which other characters are defined by V shaped grooves that cut through the raised inscription characters and through portions of said surface.

5. Means providing a surface having raised portions thereon and characters imposed upon said surface and defined by grooves that extend throughsaid raised portions and into andbelow said surface.

6. Means providing a surface having in scription characters thereon with faces spaced to one side of the plane of said s'urface'and other characters imposed upon said surface and inscription characters and formed by V shaped grooves that extend through portions of the faces of said inscription characters and extend into and below said surface. 55 7 A motor casing having a portion there-.

of provided with raised inscription characters thereon and having other characters stamped thereon and defined by V shaped grooves that extend through said raised inscription characters and into and below said surface.

V In witness whereof I aflix my signature.

' EVERETT. J. SOHWANTES. 

